App crashes with AVAudioSession privateBeginInterruption

Question

I'm testing my app on device (a soundboard) and it crashes with a EXC_BAD_ACCESS, I have use Breakpoints and the error came from [AVAudioSession privateBeginInterruption]

The crash happens following this pattern:

1. The app is launched, we see the main menu
2. A main menu button is pressed and a soundboard view is loaded (push), some buttons are pressed here and sounds are played.
3. Return to main menu ([self.navigationController popViewControllerAnimated:YES];)
4. App enters background
5. When app enters foreground and the menu button of the soundboard is pressed the app crashes.

I have no idea what is happening here, I have installed CrashLytics and it only said:

Maybe the audio session gets released from memory and the app tries to access to it and fail?

The audio session is initialised in viewDidLoad

//  Initialize audio session
[[AVAudioSession sharedInstance] setDelegate: self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error: nil];

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof    (audioRouteOverride),&audioRouteOverride);  

In viewDidUnload I have

[[AVAudioSession sharedInstance] setDelegate: nil];

Any hints?

Thanks!

Answer 1

The crash happens because you had set the delegate of session to your controller in this line

[[AVAudioSession sharedInstance] setDelegate: self];

but didn't implemented the required delegate method (interruption one)

either remove the delegate setting line or implement the delegate method to solve crash